[vte] build: Add warning

[Christian Persch <chpe src gnome org>]

commit b568d7c40a9ba0a61dfd4ad8d63c0a3fce35d077
Author: Christian Persch <chpe gnome org>
Date:   Sat Nov 26 18:02:32 2011 +0100

    build: Add warning

 configure.in |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/configure.in b/configure.in
index cf3edb7..6f67478 100644
--- a/configure.in
+++ b/configure.in
@@ -1,6 +1,6 @@
 m4_define([version_major],0)
-m4_define([version_minor],31)
-m4_define([version_micro],0)
+m4_define([version_minor],30)
+m4_define([version_micro],99)
 m4_define([version_triplet],version_major.version_minor.version_micro)
 
 m4_define([so_major_adjust],9) dnl Don't change!
@@ -11,6 +11,8 @@ AC_INIT([vte],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=vte],
         [vte])
 
+AC_MSG_ERROR([use the 'vte-0-32' (development) or 'vte-0-30' (stable) branch, not master])
+
 AC_CONFIG_SRCDIR([src/vte.c])
 AC_CONFIG_HEADERS([config.h])